The world is bracing for an influx of billions of new urbanites in the coming decades, and tech companies are rushing to build new green cities to house them. Are these companies creating a smarter metropolis — or just making money?

The world is bracing for an influx of billions of new urbanites in the coming decades, and tech companies are rushing to build new green cities to house them. Are these companies creating a smarter metropolis — or just making money?